Question

The oxidation of toluene to benzaldehyde by chromyl chloride is called ______.

Options

• Etard reaction

• Riemer-Tiemann reaction

• Stephen’s reaction

• Cannizzaro’s reaction

Answer 1

The oxidation of toluene to benzaldehyde by chromyl chloride is called Etard reaction.

Explanation:

The oxidation of toluene (C₆H₅CH₃) with chromyl chloride (CrO₂Cl₂) in CCl₄ or CS₂ to give benzaldehyde is called Etard reaction. In this reaction, the chromyl chloride first forms a brown complex. which is separated and then decomposed with H₂O to give benzaldehyde (C₆H₅CHO).